diff --git a/.circleci/config.yml b/.circleci/config.yml
index c3611c57351..46d709f9699 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -10,7 +10,7 @@ jobs:
     machine:
       image: circleci/classic:latest
     working_directory: ~/OpenAPITools/openapi-generator
-    parallelism: 3
+    parallelism: 4
     shell: /bin/bash --login
     environment:
       CIRCLE_ARTIFACTS: /tmp/circleci-artifacts
diff --git a/CI/circle_parallel.sh b/CI/circle_parallel.sh
index f1a5a529a79..e8a80f93789 100755
--- a/CI/circle_parallel.sh
+++ b/CI/circle_parallel.sh
@@ -43,6 +43,21 @@ elif [ "$NODE_INDEX" = "2" ]; then
 
   # run integration tests
   mvn --no-snapshot-updates --quiet verify -Psamples.misc -Dorg.slf4j.simpleLogger.defaultLogLevel=error
+elif [ "$NODE_INDEX" = "3" ]; then
+
+  echo "Running node $NODE_INDEX to test 'samples.circleci.node3' defined in pom.xml ..."
+  #wget https://www.python.org/ftp/python/3.8.9/Python-3.8.9.tgz
+  #tar -xf Python-3.8.9.tgz
+  #cd Python-3.8.9
+  #./configure --enable-optimizations
+  #sudo make altinstall
+  pyenv install --list 
+  pyenv install 3.6.3
+  pyenv global 3.6.3
+  python3 --version
+
+  mvn --no-snapshot-updates --quiet verify -Psamples.circleci.node3 -Dorg.slf4j.simpleLogger.defaultLogLevel=error
+
 else
   echo "Running node $NODE_INDEX to test 'samples.circleci.others' defined in pom.xml ..."
   #sudo update-java-alternatives -s java-1.7.0-openjdk-amd64
diff --git a/pom.xml b/pom.xml
index 07a261fb0d2..fd9c9502ed1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1224,12 +1224,9 @@
                 <module>samples/client/petstore/php/OpenAPIClient-php</module> -->
                 <!--<module>samples/client/petstore/javascript-apollo</module>-->
                 <module>samples/client/petstore/javascript-flowtyped</module>
-                <module>samples/client/petstore/python</module>
-                <module>samples/client/petstore/python_disallowAdditionalPropertiesIfNotPresent</module>
                 <module>samples/client/petstore/python-legacy</module>
                 <module>samples/client/petstore/python-asyncio</module>
                 <module>samples/client/petstore/python-tornado</module>
-                <module>samples/openapi3/client/petstore/python</module>
                 <module>samples/openapi3/client/petstore/python-legacy</module>
             </modules>
         </profile>
@@ -1304,6 +1301,22 @@
                 <!--<module>samples/server/petstore/kotlin/vertx</module>-->
             </modules>
         </profile>
+        <!-- node 3 tests in CircleCI -->
+        <profile>
+            <id>samples.circleci.node3</id>
+            <activation>
+                <property>
+                    <name>env</name>
+                    <value>samples.circleci.node3</value>
+                </property>
+            </activation>
+            <modules>
+                <!-- clients -->
+                <module>samples/client/petstore/python</module>
+                <module>samples/client/petstore/python_disallowAdditionalPropertiesIfNotPresent</module>
+                <module>samples/openapi3/client/petstore/python</module>
+            </modules>
+        </profile>
         <!-- other tests in CircleCI -->
         <profile>
             <id>samples.circleci.others</id>